Abstract: Provided is a gel polymer electrolyte including a matrix polymer including an oligomer containing a fluorine-substituted polyether unit and at least one acrylate unit at the end thereof. The gel polymer electrolyte increases a degree of freedom of Li ions through the immobilization and stabilization of anions to realize an effect of reducing the resistance of a battery, thereby realizing high lithium-ion conductivity. In addition, the matrix polymer structure in the gel polymer electrolyte provides enhanced high-temperature durability, and thus allows the manufacture of a lithium secondary battery having improved high-voltage high-temperature stability.

Abstract: Provided is a lithium secondary battery including a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material comprising lithium iron phosphate particles, and the positive electrode has a loading amount of 450 mg/25 cm2 to 740 mg/25 cm2, and the non-aqueous electrolyte includes a lithium salt, an organic solvent, and an additive, wherein the organic solvent includes ethylene carbonate, and dimethyl carbonate, and the dimethyl carbonate is included in 5 vol % to 75 vol % in the organic solvent, and the additive contains vinylene carbonate, and the weight ratio of the vinylene carbonate to the dimethyl carbonate is greater than 0 to 0.2 or less.

Abstract: Provided are a method of manufacturing a negative electrode for a lithium secondary battery, which includes: preparing a working electrode including a metal thin film; preparing a composition for forming a first solid electrolyte layer including an additive including at least one salt selected from salts represented by Chemical Formula 1 to Chemical Formula 5 and a glyme-based solvent; fabricating a half-cell including the working electrode, a counter electrode, a reference electrode, and the composition for forming a first solid electrolyte layer; forming a first solid electrolyte layer on the working electrode by operating the half-cell; and separating the working electrode on which the first solid electrolyte layer has been formed, and a negative electrode for a lithium secondary battery manufactured by the above-described method.

Abstract: The present invention provides a method of preparing an electrode for a lithium secondary battery which includes forming a first electrolyte layer by immersing an electrode current collector in a composition for forming the first electrolyte layer and applying a current, and forming a second electrolyte layer by immersing the electrode current collector having the first electrolyte layer formed thereon in a composition for forming the second electrolyte layer and applying a current, wherein one of the composition for forming the first electrolyte layer and the composition for forming the second electrolyte layer is a composition for forming an organic electrolyte layer, and another one is a composition for forming an inorganic electrolyte layer, and the composition for forming an inorganic electrolyte layer includes a compound represented by Formula 1.

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte. The positive electrode includes a positive electrode active material. The positive electrode active material includes lithium iron phosphate particles. A loading amount of the positive electrode is about 450 mg/25 cm2 to 740 mg/25 cm2. The non-aqueous electrolyte includes a lithium salt, an organic solvent, and an additive. The additive includes at least one selected from the group consisting of compounds represented by Formulas 1 to 3 below. The additive is included in the non-aqueous electrolyte in an amount of about 0.1 wt % to 3 wt %. wherein R1, R2, R3, R4, n, and m are as defined above.

Abstract: The present invention relates to a polymer electrolyte for a secondary battery and a lithium secondary battery including the same, and to a polymer electrolyte for a secondary battery, which includes a first polymer including a repeating unit represented by Formula 1, and a second polymer including a repeating unit derived from a monomer having at least one ethylenically unsaturated group or an oligomer thereof, and a lithium secondary battery including the same.

Abstract: The present invention relates to an electrolyte composition including a lithium salt; a non-aqueous organic solvent; a compound represented by a specific formula; and a perfluoropolyether oligomer, a gel polymer electrolyte including a polymer network which is formed by a polymerization reaction of the electrolyte composition, and a lithium secondary battery including the same.

Abstract: A secondary battery includes an electrode assembly including an anode, a cathode, and a separator disposed between the anode and the cathode; and an electrolyte composition with which the electrode assembly is impregnated. The anode is provided on at least one side of an anode collector, and has an anode active layer including, as an active anode material, a lithium metal oxide represented by Formula 1 below. The electrolyte composition contains a lithium salt and a non-aqueous organic solvent, the non-aqueous organic solvent containing, based on the total weight of the non-aqueous organic solvent, 60% by weight or more of a cyclic ester-based solvent represented by Formula 2 below.

Abstract: The present invention relates to a composition for a gel polymer electrolyte and a lithium secondary battery including a gel polymer electrolyte formed therefrom, and particularly, to a composition for a gel polymer electrolyte, which includes a lithium salt, a non-aqueous organic solvent including a glyme-based solvent, an oligomer represented by Formula 1 and having a polymerizable substituent, and a polymerization initiator, and a lithium secondary battery including a gel polymer electrolyte prepared by polymerization of the composition.

Abstract: The present disclosure provides a non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same. Specifically, the non-aqueous electrolyte solution for a lithium secondary battery of the present disclosure may include a lithium salt; a non-aqueous organic solvent; and an oligomer including a repeating unit derived from a monomer represented by Formula 1 and a repeating unit derived from a monomer represented by Formula 2. Also, the lithium secondary battery of the present disclosure may improve cycle characteristics and high-temperature storage characteristics by including the above non-aqueous electrolyte solution for a lithium secondary battery.

Abstract: A lithium secondary battery including a negative electrode comprising a carbon material as a negative electrode active material, a positive electrode comprising a positive electrode active material of Formula 2, a separator interposed between the negative electrode and the positive electrode, and a non-aqueous electrolyte comprising a lithium salt; a non-aqueous organic solvent; a first additive represented by Formula 1; and a second additive which is at least one selected from the group consisting of vinylene carbonate and vinylethylene carbonate is described, in Formulas 1 and 2, all the variables are described herein.

Abstract: An electrolyte composition and a lithium secondary battery including the same are disclose herein. The electrolyte composition has improved high temperature safety. In some embodiments, the electrolyte composition includes an additive including a compound represented by Formula 1. Each R1 is independently a single bond, an alkylene group having 1 to 10 carbon atoms, or each R2 is independently a double or triple bond including 2 carbon atoms, each R3 is independently hydrogen or an alkyl group having 1 to 4 carbon atoms, and a is an integer of 1 to 10. The additive may reinforce an SEI layer on the surface of an electrode, thereby having advantages of improved storage and lifetime characteristics at a high temperature and a decreased amount of gas generated in the battery.

Abstract: Disclosed herein relates to a novel non-aqueous electrolyte additive and a lithium secondary battery including the same, wherein the additive for the non-aqueous electrolyte additive can form a film on the surface of the electrode during the activation of the rechargeable battery to prevent a large amount of gas from being generated under high temperature conditions by including an ionic compound represented by Formula 1, and can prevent metal ions from eluting from the electrode to cause a decrease in the OCV and a decrease in the capacity retention rate of the cell, thereby effectively improving the durability, performance and high temperature safety of the cell.

Abstract: A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same. Specifically, the non-aqueous electrolyte solution for a lithium secondary battery of the present disclosure may include a lithium salt; a non-aqueous organic solvent; and an oligomer including a repeating unit derived from a monomer represented by Formula 1, a repeating unit derived from a monomer represented by Formula 2, and a repeating unit derived from a monomer represented by Formula 3. Also, the lithium secondary battery of the present disclosure may improve cycle characteristics and high-temperature storage characteristics by including the above non-aqueous electrolyte solution for a lithium secondary battery.

Abstract: The present disclosure relates to an additive for a non-aqueous electrolyte, which includes a compound represented by Formula 1 capable of improving life characteristics of a lithium secondary battery by forming a stable and low-resistance electrode-electrolyte interface even at a high temperature, and a non-aqueous electrolyte and a lithium secondary battery which include the same.

Abstract: A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are described herein. Specifically, the non-aqueous electrolyte solution for a lithium secondary battery includes a lithium salt, an organic solvent and a compound represented by Formula 1 to form a robust SEI film, thereby improving battery performance: Wherein R1 to R3 are described herein.

Abstract: An electrolyte additive comprising a compound represented by Formula 1 below forms a coating film on an electrode surface in the activation of a secondary battery, thereby the generation of a large amount of gas under a high temperature condition can be prevented, and a cell OCV drop and a decrease in capacity retention rate, which are caused by elution of metal ions from an electrode, can be effectively prevented, resulting in effective improvement in durability, performance and high-temperature safety of the battery, wherein R1, R2, and M are described herein.